/// <summary>
 /// 批量删除实体
 /// </summary>
 /// <param name="entityList"></param>
 public virtual void BatchDelete(List <T> entityList)
 {
     using (DbBase DbContext = new DbBase(connectionName))
     {
         //自动新增事务处理
         using (var tran = DbContext.GetDbTransaction())
         {
             DbContext.DeleteBatch <T>(entityList, tran);
             tran.Commit();
         }
         DbContext.CloseConnection();
     }
 }